Honestly those trade show guys are just hustling for a quick sale. I mean, maybe check if the brand has any actual customer service contact online, like a real website. Sometimes those companies exist but they just sell junk. It's a gamble because you can't test it properly on the floor with all that noise and hype.

My last one took ten minutes flat.

Sounds about right for those gimmicky adapters. Just use a basic dovetail plate and save the headache.